Mobile version



The Topex/Poseidon satellite was launched on 10 August 1992 with the objective of "observing and understanding the ocean circulation". A joint project between Nasa, the US space agency, and Cnes, the French space agency, it carries two radar altimeters and precise orbit determination systems, including the <link http: web _blank>Doris system.

Topex/Poseidon is laying the foundation for long-term ocean monitoring from space. Every ten days, it supplies the world's ocean topography, or sea surface height, with unprecedented accuracy.

From the launching of Jason-1, in December 2001, the 2 satellites had one-day shift. On September 15, 2002 Topex/Poseidon assumed a new orbit midway between its original ground tracks. Then, the former Topex/Poseidon ground tracks were overflown by Jason-1 and are currently overflown by Jason-2. These tandem missions demonstrate the scientific capabilities of a constellation of optimized altimetric satellites.
The mission ended on October 2005 due to a failure in a  pitch reaction wheel.

The Topex/Poseidon mission : an unrivalled success

Everybody, and in particular anyone who has been involved from the very beginning, is now left with the feeling that they were part of a great adventure, from a technical and above all a human perspective. During its thirteen years of operation, Topex/Poseidon witnessed many developments and innovations and even some media success. As for its overall success, the mission will be remembered both for the expected applications and the additional ones which led to greater interest in this type of satellite data.

Satellite  Topex/Poseidon
Launch on  10/08/1992
End Date  18/01/2006
Altitude  1336 km
Inclination  66 °
Repetitivity  9.9156 days
Agency  Nasa/Cnes
Goals  Measure sea surface height

Sea also:

    Rss feedsContactPartnersFAQLexiconLegal noticePersonal Data Protection PolicyMobile
    You must enable cookies in your browser preferences to save the modifications
    You are using an older version of Internet Explorer, please update to take full advantage of Aviso+ features

    Customize the home page

    View all widgets
    Reduce display
    Public profile
    User profile

    Select/Deselect widgets

    Discover AVISO+

    Customizable home, reading tools, products search guide, etc.. Discover step by step the features of the new site AVISO+.

    Customizable homepage

    This home page is composed of blocks called "widgets".

    Rearrange the blocks with a "Click & Drop".

    Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

    All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

    Reading tools

    Ease your reading by choosing the page background colour (black/white) and/or by modifying the font size.

    Browsing menu and breadcrum trail

    To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.

    Products search guide

    The first submenu of the "Data" banner item leads you to a new search form enabling you to find quickier the product that suits your needs. The list of results is updated according to your selection criteria.

    AVISO+ Multimedia

    The first submenu of the "Multimedia" banner item leads you to AVISO+ collections of images and videos linked to altimetry and its applications. Have a nice visit!